[JFFS2] Optimise jffs2_add_tn_to_list
Use an rbtree instead of a simple linked list. We were wasting
an amazing amount of time in jffs2_add_tn_to_list().
Thanks to Artem Bityuckiy and Jarkko Jlavinen for noticing.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index a65539f..b34c397 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: nodelist.h,v 1.130 2005/04/09 10:46:59 dedekind Exp $
+ * $Id: nodelist.h,v 1.131 2005/07/05 21:03:07 dwmw2 Exp $
*
*/
@@ -161,7 +161,7 @@
*/
struct jffs2_tmp_dnode_info
{
- struct jffs2_tmp_dnode_info *next;
+ struct rb_node rb;
struct jffs2_full_dnode *fn;
uint32_t version;
};
@@ -387,7 +387,7 @@
D2(void jffs2_print_frag_list(struct jffs2_inode_info *f));
void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list);
int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
- struct jffs2_tmp_dnode_info **tnp, struct jffs2_full_dirent **fdp,
+ struct rb_root *tnp, struct jffs2_full_dirent **fdp,
uint32_t *highest_version, uint32_t *latest_mctime,
uint32_t *mctime_ver);
void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state);